No £50k a year does not make you rich, given that you will pay £13k in tax and NI, which means a net £37k.

Yes some will see £3k a month as making you rich but it doesn't compared to higher earners. If the £50k job is in London you need to then factor in higher commuting costs or higher housing and living costs, which will reduce your disposable income even further.

No it doesn’t make you rich. One son is an aircraft engineer on over 50k, gets no child benefit, has large mortgage, only lives in Shoreham, three bed house. Other son and daughter-in-law both teachers, combined pay over 50k, also big mortgage, but get child benefit for their two children. No one living in Sussex trying to buy a house is rich!